Under Armour Boys' Gameday Armour Chest Short Sleeve 100% Polyester Imported Chest padding delivers protection where you need it most Gameday Armour pads are waterproof, lightweight, ultra-durable, giving you the right protection, where you need it Smooth HeatGear fabric keeps you comfortable all game Mesh underarm & back panels deliver strategic ventilation 4-way stretch fabrication allows greater mobility in any direction